查看帮助
先创建一个有资源限制的pod
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| kubectl run myapp --image=ikubernetes/myapp:v1 --replicas=1 --requests='cpu=50m,memory=256Mi' --limits='cpu=50m,memory=256Mi' --labels='app=myapp' --expose --port=80
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创建一个HPA
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| kubectl autoscale --help //查看帮助
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| kubectl autoscale deployment myapp --min=1 --max=8 --cpu-percent=60
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| kubectl patch svc myapp -p '{"spec":{"type":"NodePort"}}'
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| kubectl get svc //查看这个服务端口
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| yum install -y httpd-tools
ab -c 1000 -n 500000 http://IP:PORT/index.html
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查看效果
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| kubectl get pods
kubectl describe hpa
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vim myapp-hpa-demo.yaml
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| apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: mapp-hpa
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: myapp
minReplicas: 1
maxReplicas: 10
metrics:
- type: Resource
resource:
name: cpu
targetAverageUtilization: 55
- type: Resource
resource:
name: memory
targetAverageValue: 50Mi
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应用这些文件
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| kubectl apply -f myapp-hpa-demo.yaml
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压测
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| yum install -y httpd-tools
ab -c 1000 -n 500000 http://IP:PORT/index.html
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查看效果
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| kubectl get pods
kubectl describe hpa
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可以看到会自动扩展
比如其他的指标
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| apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: mapp-hpa
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: myapp
minReplicas: 1
maxReplicas: 10
metrics:
- type: Pods
pods:
metricName: http_requests
targetAverageValue: 800m
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